CN102714292B - Battery pack having outstanding structural stability - Google Patents

Battery pack having outstanding structural stability Download PDF

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Publication number
CN102714292B
CN102714292B CN201180006884.6A CN201180006884A CN102714292B CN 102714292 B CN102714292 B CN 102714292B CN 201180006884 A CN201180006884 A CN 201180006884A CN 102714292 B CN102714292 B CN 102714292B
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China
Prior art keywords
battery pack
battery
end plate
main member
cell module
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Application number
CN201180006884.6A
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Chinese (zh)
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CN102714292A (en
Inventor
秋渊奭
李珍圭
李汎炫
郑尚胤
林艺勋
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Lg Energy Solution
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LG Chemical Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/66—Arrangements of batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/42—Grouping of primary cells into batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S903/00—Hybrid electric vehicles, HEVS
    • Y10S903/902—Prime movers comprising electrical and internal combustion motors
    • Y10S903/903—Prime movers comprising electrical and internal combustion motors having energy storing means, e.g. battery, capacitor
    • Y10S903/904—Component specially adapted for hev
    • Y10S903/907—Electricity storage, e.g. battery, capacitor

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

Provided is a battery pack comprising: a battery-module-arranging body in which 2 or more rows of battery modules are transversely arranged having a structure resulting from the vertical stacking of unit modules housing two or more battery cells or battery cells themselves; a base plate where battery modules are stacked standing vertically; a pair of main members which are respectively positioned against the front surface and the rear surface of the battery-module-arranging body in order to support the weight of the battery modules, and having a structure whereby both end parts are fastened to an external device; a pair of end plates in intimate contact with the front surface and the rear surface of the battery-module-arranging body, in a state in which the bottom ends are secured to the base plate; and a supporting bar which links both sides of the side surfaces or the upper part of the end plates in order to mutually link and support the end plates; wherein the end plates are integrally formed to a size corresponding to the front surface or the rear surface of the battery-module-arranging body so as to be able to minimise deformation of the battery pack in response to vibration in the vertical direction.

Description

There is the battery pack of superior structural stability
Technical field
The present invention relates to the battery pack with superior structural stability, and more specifically, relate to a kind of battery pack, described battery pack comprises: cell module array, and described cell module array has in a lateral direction with the battery module that the mode of two or more columns is arranged; Substrate, battery module is stacked on the substrate under state upright vertically; A pair main member, described a pair main member is arranged on the front and rear place of cell module array; A pair end plate, described a pair end plate is configured to the front and rear close contact with cell module array; And support bar, between the top that described support bar is connected end plate or sidepiece, wherein each end plate is formed with the shape had corresponding to the monomer of the front portion of cell module array or the size at rear portion, with the distortion of the minimise battery group when battery module vibrates along the vertical direction.
Background technology
One of greatest problem caused by the vehicle of the fossil fuel using such as gasoline or diesel oil is that air-polluting produces.Use can have been attracted considerable concern as the technology of the power supply for vehicle as a kind of method solved the problem by the secondary cell of charging and discharging.As a result, the hybrid electric vehicle (HEV) of motor vehicle (EV) and conbined usage battery and the conventional engine only using battery operation has been developed.Now some motor vehicles and hybrid electric vehicle commercial.Nickel metal hydride (Ni-MH) secondary cell is mainly used as the power supply of motor vehicle (EV) and hybrid electric vehicle (HEV).But, in recent years, attempt using lithium ion battery.
For the secondary cell that the power supply being used as motor vehicle (EV) and hybrid electric vehicle (HEV) is such, high-energy and high power capacity are required.For this reason, multiple small-sized secondary batteries (element cell) is connected to form battery module and battery pack in the mode be one another in series.According to circumstances, small-sized secondary batteries (element cell) is one another in series and is connected in parallel to form battery module and battery pack.
Usually, such battery pack has the structure of protection battery module, and each battery module has the secondary cell be arranged on wherein.The structure of battery module can change the installation site in vehicle based on the kind of vehicle or battery pack.Effectively fixing one of structure of high-capacity battery module is based on support bar and end plate.This structure is favourable, even if because in the motion towards also minimise battery module during support bar imposed load.But, for this reason, be necessary that the rigidity guaranteeing support bar and end plate fully.
Relevant to this situation, Fig. 1 is the perspective view schematically showing the conventional batteries group comprising single battery module.
With reference to figure 1, battery pack 100 comprises: unit module 10, and each described unit module has the secondary cell be arranged on wherein; Substrate 20; A pair end plate 30; And support bar 40.
Under the state that unit module 10 is upright vertically, described unit module 10 is stacked on the top place of substrate 20.With the outside close contact of outmost unit module 10 under the state that the lower end that described end plate 30 is provided in each end plate 30 is fixed to substrate 20.
End plate 30 is interconnected and supports end plate 30 between the top that support bar 40 is connected end plate 30.
But the battery pack with above-mentioned structure only uses single battery module, the capacity of result battery pack is low.For this reason, the external equipment of high-energy and high-capacity battery group that the needs battery pack with above-mentioned structure being applied to such as vehicle is difficult.
Meanwhile, based on kind or the installation site of battery pack in vehicle of vehicle, the battery pack for hybrid electric vehicle is constructed in a variety of manners stably to protect cell array.Is the battery pack with bucket configuration in such battery pack, and described battery pack is installed in the bottom of the luggage case of vehicle or is installed in the dented space between the lower end of the back seat being limited to vehicle and luggage case.
In this case, battery pack is positioned at the below that battery pack is secured to the place on the chassis of vehicle.Therefore, be necessary that and such structure is provided: battery pack is by main member and base plate supports, and the front and rear that end plate and support bar are positioned at battery pack is sentenced and just prevented battery pack to be out of shape in the longitudinal direction.In the structure shown here, main member is bent by the shape with scraper bowl, and therefore, the structural stability of the entirety of battery pack depends on the rigidity of main member and determines.
The rigidity of main member can be improved by the thickness of the degree of depth or each main member that increase flange fully.But, due to the limited installing space in vehicle, so the degree of depth of flange can not be increased fully.And the thickness increasing each main member adds the load of battery pack.As a result, the structural stability of battery pack can not be improved.
Therefore, battery configuration is very important for having following structure: battery module is positioned at the below that battery pack is secured to the place on the chassis of vehicle, the main member of the load of support cells group has shovel bucket form, and battery module is disposed on substrate in the mode of two row, wherein while the maintenance degree of depth of flange and the thickness of each main member, the structural stability of battery pack is enhanced.
Summary of the invention
Technical problem
Therefore, the present invention is made to overcome the above problems and other still unsolved technical problem.
Particularly, the object of this invention is to provide battery pack, described battery pack comprises: cell module array, and described cell module array has in a lateral direction with the battery module that the mode of two or more columns is arranged; Substrate; Main member; End plate; And support bar, wherein each end plate is formed with the shape had corresponding to the monomer of the front portion of cell module array or the size at rear portion, with the distortion of the minimise battery group when battery module vibrates along the vertical direction.
Another object of the present invention is to provide the battery pack being configured to have and using a part for vehicle to form the structure of a part for battery pack, thus battery pack can be stably mounted in vehicle and the volume that battery pack occupies in vehicle can be minimized.
Technical scheme
According to an aspect of the present invention, above and other object can realize by providing following battery pack, described battery pack comprises: cell module array, described cell module array has the battery module being arranged to two or more columns in a lateral direction, each battery module is constructed to have following structure, in the structure shown here, stacking described battery unit or unit module under battery unit or the upright vertically state of unit module, each described unit module has two or more battery units be arranged on wherein; Substrate, battery module is stacked on the substrate under state upright vertically; A pair main member, the front and rear that described a pair main member is arranged on cell module array sentences the load of support cells module, and the end opposite of each main member is secured to external equipment; A pair end plate, with cell module array close contact under the state that the lower end that described a pair end plate is provided in each end plate is fixed to substrate; And support bar, described support bar is connected between the top of end plate or sidepiece to be interconnected by end plate and to support end plate, wherein each end plate is formed with the shape had corresponding to the monomer of the front portion of cell module array or the size at rear portion, with the distortion of the minimise battery group when battery module vibrates along the vertical direction.
Therefore, in battery pack according to the present invention, each end plate is formed as the shape of the monomer with the size corresponding with the front portion of cell module array or rear portion, increases the bending stiffness of main member thus fully and improves the structural stability that battery pack resists the entirety of vertical vibrating fully.
In addition, the end opposite of each main member is secured to external equipment.Therefore, though when battery pack be positioned at battery pack be secured to the below in the place of external equipment time, also battery pack can be easily mounted to external equipment.
In addition, under the state that unit module is upright vertically, the battery module of stackable unit module is arranged in the mode of two or more columns in a lateral direction.Therefore, the energy higher than the conventional batteries group comprising single battery module and the capacity of Geng Gao can be provided according to battery pack of the present invention.
In the present invention, each unit module can be secondary cell or the small modules with two or more secondary cells be arranged on wherein.The example with the unit module of two or more secondary cells be arranged on wherein is disclosed in in the korean patent application No.2006-12303 of the name of the applicant of the application submission.This patent application open in, unit module is constructed to have such structure: under the state that secondary cell is intimate contact with one another, and two secondary cells are installed in the framing component with input terminal and lead-out terminal.
Another example of unit module is disclosed in also with in korean patent application No.2006-20772 and No.2006-45444 of the name of the applicant of the application submission.In each open in these patent applications, unit module is constructed to have such structure: under the state that secondary cell is intimate contact with one another, and the outside of two secondary cells is covered by a pair high strength battery cover.
Above patent application be disclosed in this by reference to merging.Certainly, but, the above example of unit module disclosed in above patent application is not limited to according to the structure of each unit module of battery module of the present invention.
Preferably each battery unit is the plate-shaped battery cell providing high stacking rate in the confined space.Such as, each battery unit can be configured to have electrode assemblie and be installed in structure in the battery case formed by laminate.
Particularly, each battery unit is pouch-shaped secondary battery, and in described pouch-shaped secondary battery, the electrode assemblie of cathode/separator/anode structure is arranged in battery case together with electrolyte under the state of sealing.Such as, each battery unit can be the pouch-shaped secondary battery of the roughly hexahedron structure structure with little thick wide ratio.Usually, pouch-shaped secondary battery comprises pouch-shaped battery case.Battery case is configured to have laminate structure, in described laminate structure, the external coating formed by the fluoropolymer resin presenting high-durability, by stopping the barrier layer that the metal material of moisture or air is formed and by can being sequentially stacked by the inner sealant layer that the fluoropolymer resin of thermal weld is formed.
Do not limit the structure of each main member especially, as long as each main member can the load of easily support cells module.Preferably, each main member is configured to have the frame structure of surrounding the opposition side of cell module array and the roughly U-shaped of bottom.
Therefore, the opposition side of each main member is connected to a corresponding end plate, and the inside of the frame structure of result U-shaped is full, and therefore, the bending stiffness of each main member opposing vertical vibrating is substantially improved.
In the preferred exemplary of said structure, the upper end of each main member can be outwardly bent thus battery pack can be easily mounted to external equipment, and the sweep of each main member can be provided with fastener hole.Therefore, the connection between main member and external equipment is reliably realized.
Each end plate can be constructed to the pressure (bending load) disperseed from battery module and support bar.Preferably, each end plate comprises: body part, and described body part is configured to contact with described cell module array; Upper end wall; Lower end wall; And pair of sidewalls; Described upper end wall, described lower end wall and described sidewall are from the periphery of described body part outwardly.Here, " outward direction " is meant to the direction contrary with pressure, and the side of namely being located by the body part about each end plate with battery module and support bar in the opposite direction.
Therefore, in battery pack according to the present invention, the battery module be stacked on substrate is intimate contact with one another by end plate, and end plate is fixed by support bar.Therefore, it is possible to prevent the unit module forming each battery module from moving in the thickness direction thereof and swell (swell), improve the fail safe of battery module thus and effectively prevent the penalty of battery module.
In the preferred exemplary of said structure, the lower end wall of each end plate can by the lower end of weld or the be spirally connected lower end that is connected to substrate and each main member.
When lower end by weld or the be spirally connected lower end that is connected to substrate and each main member of the lower end wall of each end plate, weld or be spirally connected and preferably implement at a four or more point place, realize positive connection betwixt thus.
In another example, each sidewall of each end plate can be connected to each side of each main member by welding or being spirally connected.
When each end plate each sidewall all by weld or be spirally connected each side being connected to each main member, weld or be spirally connected and can implement at one or more some place.Particularly, consider the pattern of main member distortion, when welding or be screwed onto three some places and implementing, the connection between end plate and main member is enhanced.
Meanwhile, the top of end plate or sidepiece can be interconnected by support bar.
At support bar by interconnective for the top of end plate structure, the upper end wall of each end plate projects upwards from the top of cell module array thus support bar can be easily mounted to end plate.In the structure shown here, under the state that support bar is positioned at above battery module, support bar can be coupled to end plate.
The height projected upwards of upper end wall can be equivalent to 2% to 20% of the height of cell module array.If the height projected upwards of upper end wall is less than 2% of the height of cell module array, be then difficult to support bar to be installed to end plate.Alternately, the support bar with correspondingly-sized can be used.But in this case, the global stiffness of battery pack is lowered.On the other hand, if the height projected upwards of upper end wall is greater than 20% of the height of cell module array, then the volume of battery pack is increased excessively, and this is not preferred.
Because the lower end wall of end plate is fixedly coupled to substrate, so prevent the end plate when external impact is applied to end plate to be separated from substrate.
Such as, a pair fastener hole can be formed in the part place of the lower end wall of each end plate, and bolt can be inserted by fastener hole, thus end plate can be fixed to substrate.Alternately, the connection between end plate and substrate can be realized by welding.
Meanwhile, as long as each end plate has the size at front portion corresponding to cell module array or rear portion, the size of each end plate is not just specifically limited.Such as, each end plate can be formed as the flat shape of rectangle.
Preferably, each end plate at an upper portion thereof place is provided with through hole, and support bar is installed in described through hole.Support bar is inserted by through hole, easily realizes the connection between end plate and support bar thus.
According to another aspect of the present invention, provide use with above-mentioned structure battery pack as power supply, there is limited installing space and be exposed to the motor vehicle of vibration and strong impact frequently, hybrid electric vehicle or plug-in hybrid electric vehicle.
Certainly, the battery pack as the power supply of vehicle can based on desired power and combined capacity and manufacture.
In this case, vehicle can be motor vehicle, hybrid electric vehicle or plug-in hybrid electric vehicle, and wherein battery pack is installed in the lower end of the luggage case of vehicle or between the back seat and luggage case of vehicle.
Use described battery pack to be well-known as the motor vehicle of its power supply, hybrid electric vehicle or plug-in hybrid electric vehicle in the correlation technique belonging to the present invention, and therefore will not provide its detailed description.
Accompanying drawing explanation
According to detailed description with the accompanying drawing subsequently, above and other object of the present invention, other advantage of characteristic sum will be more expressly understood, wherein:
Fig. 1 is the perspective view that conventional battery pack is shown;
Fig. 2 is the perspective view that battery pack is according to an embodiment of the invention shown;
Fig. 3 is the perspective view of the battery pack illustrated according to another embodiment of the invention;
Fig. 4 be illustrate with compared with the structure of battery pack of the present invention shown in figure 2, end plate is installed to the perspective view of the structure of the comparison battery pack of each battery module;
Fig. 5 and 6 is the perspective views of the change illustrated when external force is applied to the battery pack illustrated in figures 2 and 4 in left-right direction;
Fig. 7 and 8 is the perspective views of the change illustrated when external force is applied to the battery pack illustrated in figures 2 and 4 along the longitudinal direction; And
Fig. 9 and 10 is the perspective views of the change illustrated when external force is applied to the battery pack illustrated in figures 2 and 4 along the vertical direction.
Embodiment
Now, exemplary embodiment of the present invention is described in detail with reference to accompanying drawing.However it is to be noted that scope of the present invention is not by the restriction of illustrated embodiment.
Fig. 2 is the perspective view that battery pack according to an embodiment of the invention is typically shown.
With reference to figure 2, battery pack 200 comprises: cell module array 122, and described cell module array 122 is included in the battery module 110 and 120 being arranged to two row in a lateral direction; Substrate 130; A pair main member 140; A pair end plate 150; And multiple support bar 160.
Under the state that battery module 110 and 120 is upright vertically, battery module 110 and 120 is stacked on the top of substrate 130.With the front and rear close contact of cell module array 122 under the state that the lower end that end plate 150 is provided in end plate 150 is fixed to substrate 130.
The front and rear that main member 140 is arranged on cell module array 122 sentences the load of support cells module 110 and 120.The end opposite of each main member 140 is secured to external equipment (not shown).
In addition, each main member 140 is all configured to have and surrounds the opposition side of cell module array 122 and the U-shaped framework of bottom.The upper end of each main member 140 is bent outwardly.The sweep of each main member 140 is provided with fastener hole 142, and by described fastener hole 142, battery pack 200 can be easily mounted to external equipment.
End plate 150 is interconnected and supports end plate 150 between the top that support bar 160 is connected end plate 150.
Each end plate 150 is formed as the flat shape of the rectangle with the size corresponding with the front portion of cell module array 122, with the distortion of the minimise battery group 200 when battery pack 200 is vibrated along the vertical direction.
In addition, each end plate 150 comprises: body part 152, and described body part 152 is configured to contact with cell module array 122; Upper end wall 154; Lower end wall 156; And pair of sidewalls 158.Upper end wall 154, lower end wall 156 and sidewall 158 are from the periphery of body part 152 outwardly.
The lower end wall 156 of each end plate 150 is by the lower end of spot welding link to substrate 130 and the lower end of each main member 140.Each sidewall 158 of each end plate 150 is welded in by point each side that three point 153 places are connected to each main member 140.
According to circumstances, the lower end wall 156 of each end plate 150 can be connected to the lower end of substrate 130 and the lower end of each main member 140 by the (not shown) that is spirally connected.In the same way, each sidewall 158 of each end plate 150 can be connected to each side of each main member 140 at three point 153 places by the (not shown) that is spirally connected.
In addition, the upper end wall 154 of each end plate 150 projects upwards from the top of cell module array 122 thus the upper end wall 154 of each end plate 150 is higher than the height H of cell module array 122 by 10%.Therefore, support bar 160 can be easily mounted to the top 155 of end plate 150.
Battery module 110 be configured to have under unit module is by state upright vertically stacking each include the structure of the unit module of plate-shaped battery cell, each described plate-shaped battery cell has the electrode assemblie in the battery case being installed in and being formed by laminate.
Fig. 3 is the perspective view of the battery pack illustrated according to another embodiment of the invention.
With reference to figure 3, except each end plate 150 at an upper portion thereof place be provided with support bar 160 is installed through hole 157 except, the battery pack 200a of Fig. 3 is structurally identical with the battery pack 200 of Fig. 2, and therefore will not provide it and describe in detail.
Fig. 4 be typically illustrate with the Structure Comparison according to battery pack of the present invention shown in figure 2, end plate is installed to the perspective view comparing the structure of battery pack of each battery module.
The sidewall being formed to have the size corresponding with the front and rear of battery module 110b and 120b and end plate 150b and 151b except end plate 150b and 151b is not be soldered to except the sidepiece of main member 140b, and the battery pack 200b of Fig. 4 is structurally identical with the battery pack of Fig. 2.
Fig. 5 and 6 is the perspective views of the change typically illustrated when external force is applied to the battery pack illustrated in figures 2 and 4 in left-right direction, obtains the structure illustrated in figs. 5 and 6 that will be described below and the structure illustrated in figures 7 and 8 by the change of simulation when external force is applied to battery pack.
With reference to these accompanying drawings, when (direction along being represented by arrow) is applied to the battery pack 200 of Fig. 2 to external force in left-right direction, the distortion of main member 140 is low.On the other hand, when external force is applied to the battery pack 200b of Fig. 4, the distortion of main member 140 is applied to battery pack direction in external force is high, and result main member 140 is greatly separated from the sidewall 158b of end plate 151 in left-right direction.
Fig. 7 and 8 is the perspective views of the change typically illustrated when external force is applied to the battery pack illustrated in figures 2 and 4 along the longitudinal direction.
With reference to these accompanying drawings, when (direction along being represented by arrow) is applied to the battery pack 200 of Fig. 2 to external force along the longitudinal direction, the distortion of main member 140 is low.On the other hand, when external force is applied to the battery pack 200b of Fig. 4, the distortion of main member 140 is applied to battery pack direction in external force is high, and result main member 140 is greatly separated from the sidewall 158b of end plate 151 along the longitudinal direction.
Fig. 9 and 10 is the perspective views of the change illustrated when external force is applied to the battery pack illustrated in figures 2 and 4 along the vertical direction.
With reference to these accompanying drawings, when (direction along being represented by arrow) is applied to the battery pack 200 of Fig. 2 to external force along the vertical direction, the distortion of main member 140 is low.On the other hand, when external force is applied to the battery pack 200b of Fig. 4, the distortion of main member 140 is applied to battery pack direction in external force is high, result main member 140 around its in the middle part of 142 greatly bending downwards.
In addition, when external force is applied to battery pack in left-right direction, along the longitudinal direction and along the vertical direction, the determination and analysis of resonance point is implemented to understand the vibration characteristics of battery pack structure and battery pack structure shown in Figure 4 shown in figure 2 to deformation pattern.Provide in the result of the determination and analysis of resonance point table 1 below.
< shows 1>
If see from the table 1 of top, in each deformation pattern, because the battery pack of Fig. 2 is constructed to have each end plate be monomer and the sidewall of end plate is soldered to the structure of the sidepiece of main member, so the structural stability of the battery pack of Fig. 2 when battery pack judder is higher than the structural stability of the battery pack of Fig. 4.
Therefore, it is possible to by each end plate is configured to monomer simply to minimize the vibration as less desirable result of main member.
Particularly, in battery pack according to the present invention, each end plate is the monomer with the size corresponding with the front portion of cell module array or rear portion.When the weight of battery pack is 30Kg or larger, and when when battery pack is vibrated along the vertical direction, the main member of battery pack is structural weakness, the present invention can be applied to the vehicle that can't stand vertical vibrating.
Although disclose exemplary embodiment of the present invention for illustrating object, but what those skilled in the art will recognize that is, when not departing from scope and spirit of the present invention disclosed in the claim as enclosed, various modification, increase and substitute be possible.
Industrial applicibility
As apparent from the above description, battery pack according to the present invention is constructed to have the structure that battery module is arranged to two or more columns in a lateral direction.Therefore, the power higher than the battery pack of the routine comprising single battery module and capacity can be provided according to battery pack of the present invention.And each end plate is the monomer with the size corresponding with the front portion of cell module array or rear portion.Therefore, it is possible to the distortion of minimise battery group when battery pack is vibrated along the vertical direction.
And, use a part for vehicle to construct a part for battery pack.Therefore, it is possible to stably install battery pack and the volume that occupies in vehicle of minimise battery group in vehicle.

Claims (18)

1. a battery pack, comprising:
Cell module array, described cell module array has the battery module being arranged to two or more columns in a lateral direction, each described battery module is all configured to have following structure, in the structure shown here, battery unit or unit module are stacked under described battery unit or the upright vertically state of unit module, and each described unit module all has two or more battery units be arranged on wherein;
Substrate, described battery module is stacked on the substrate under state upright vertically;
A pair main member, the front and rear that described a pair main member is arranged on described cell module array sentences the load supporting described battery module, and the end opposite of each described main member is secured to external equipment;
A pair end plate, with the front and rear close contact of described cell module array under the state that the lower end that described a pair end plate is provided in each described end plate is fixed to described substrate; And
Support bar, described support bar is connected to be interconnected by described end plate and to support described end plate between the top of described end plate or sidepiece, wherein
Each described end plate is formed as the shape of the monomer with the size corresponding with the front portion of described cell module array or rear portion, to minimize the distortion of described battery pack when described battery pack is vibrated along the vertical direction,
Wherein, each described end plate includes body part, upper end wall, lower end wall and pair of sidewalls, described body part is configured to contact with described cell module array and has and the identical size in the front portion of described cell module array or rear portion, described upper end wall, described lower end wall and described sidewall from the periphery of described body part outwardly, and
Wherein, the described upper end wall of each described end plate projects upwards from the top of described cell module array, thus described support bar can be easily mounted to described end plate.
2. battery pack according to claim 1, wherein, each described battery unit is all plate-shaped battery cell.
3. battery pack according to claim 2, wherein, each described battery unit is all configured to have electrode assemblie and is installed in structure in the battery case formed by laminate.
4. battery pack according to claim 1, wherein, each described main member is all configured to have and surrounds the opposition side of described cell module array and the U-shaped frame structure of bottom.
5. battery pack according to claim 4, wherein, the upper end of each described main member is all bent outwardly and makes described battery pack to be easily mounted to external equipment, and the sweep of each described main member is equipped with fastener hole.
6. battery pack according to claim 1, wherein, the described lower end wall of each described end plate is connected to the lower end of described substrate and the lower end of each described main member by welding or be spirally connected.
7. battery pack according to claim 6, wherein, described welding or described in be screwed onto four or more some place and implement.
8. battery pack according to claim 1, wherein, each described sidewall of each described end plate is connected to each side of each described main member by welding or be spirally connected.
9. battery pack according to claim 8, wherein, described welding or described in be screwed onto one or more some place implement.
10. battery pack according to claim 1, wherein, the height projected upwards equals 2% to 20% of the height of described cell module array.
11. battery pack according to claim 1, wherein, each described end plate is all formed the flat shape of rectangle.
12. battery pack according to claim 1, wherein, be provided with through hole at the top place of each described end plate, described support bar is installed in described through hole.
13. 1 kinds of motor vehicles, described motor vehicle uses battery pack according to claim 1 as power supply.
14. motor vehicles according to claim 13, wherein, described battery pack is installed in the lower end of the luggage case of described vehicle or is installed between the back seat of described vehicle and described luggage case.
15. 1 kinds of hybrid electric vehicles, described hybrid electric vehicle uses battery pack according to claim 1 as power supply.
16. hybrid electric vehicles according to claim 15, wherein, described battery pack is installed in the lower end of the luggage case of described vehicle or is installed between the back seat of described vehicle and described luggage case.
17. 1 kinds of plug-in hybrid electric vehicles, described plug-in hybrid electric vehicle uses battery pack according to claim 1 as power supply.
18. plug-in hybrid electric vehicles according to claim 17, wherein, described battery pack is installed in the lower end of the luggage case of described vehicle or is installed between the back seat of described vehicle and described luggage case.
CN201180006884.6A 2010-01-27 2011-01-26 Battery pack having outstanding structural stability Active CN102714292B (en)

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US8808896B2 (en) 2014-08-19
US20130319777A1 (en) 2013-12-05
US20130186700A1 (en) 2013-07-25
US8728648B2 (en) 2014-05-20
EP2530765A4 (en) 2013-07-03
KR20110087938A (en) 2011-08-03
WO2011093637A3 (en) 2011-11-10
WO2011093637A2 (en) 2011-08-04
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EP2530765A2 (en) 2012-12-05
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CN102714292A (en) 2012-10-03
EP2530765B1 (en) 2017-09-20

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